William c



(No Model.)

- W. G. BAKER.

GAR HEATER.

No. 498,924, Patented June 6, 1893.

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. UNITED STATES PATENT OFFICE.

WVILLIAM' C. BAKER, OF NEWV YORK, N. Y.

CAR-HEATER.

SPECIFICATION forming part of Letters Patent No. 498,924, dated June 6, 1893.

Application filed January 6, 1892. Serial No. 417,232. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM G. BAKER, a citizen of the United States, residing at the city and State of New York, have invented an Improvement in Oar-Heaters, of which the following is a specification.

This invention is a modification of an improvement upon the car heater patented to me October 1, 1889, No. 411,915, and it relates to the steam attachment for heatingthe circulating water, such attachment being applied to the rising pipe and circulating apparatus between the coil or fire heater and the expansion chamber.

In the drawings Figure l is a vertical section of the steam heating portion and a diagrammatic representation of the heating coil and circulating pipes. Fig. 2 is a sectional plan view at the line as m, Fig. 1, and Fig. 3 is a detached sectional view at the line y y, Fig. 2 of the five way coupling for the lower end of the steam chamber.

In applying steam to heat water in a pipe and to cause that water to circulate rapidly,

it is advantageous to have the pipe comparatively small, so that there will not be an upward circulation at the surface of the pipe and a downward circulation in the middle portion of the water, and at the same time it is important in car heating apparatus to provide an ample channel for the water to circulate Without obstruction in one part of the circulating and heating coil, because the rapidity of circulation is controlled at the place of greatest resistance.

To provide for these conditions I employ the ordinary coil A to be introduced in the fire chamber of the usual Baker heater or any other similar car heater, and the pipe B brings the return circulation to the bottom of this coil A, and the expansion vessel or drum 0 is this place without occupying any more space in the car than usual with the Baker heater; but it is to be understood that I do not limit the use of my present improvements at this precise place in the circulating system.

My steam heating device is composed of an outer case F screwed into the flanges of the heads G and G, and within this case are three or more longitudinal vertical tubes H; I prefer to make use of four of these tubes and they are screwed at the top and bottom ends into the five way couplings I, such vertical tubes H having right and left hand screw threads at the opposite ends so that they are screwed into the couplings and the couplings drawn toward each other by turning thepipes progressively a portion of a rotation each time, until the pipes are screwed so as to be watertight at the opposite ends, and these couplings receive at their respective ends the thimbles K K that pass through the respective heads G G and are united in the circulating system by the elbow L to the upper end of the coil A and by the flanges N to the bottom of the expansion drum 0. Each coupling has a body diverging from the single opening at one end to the plate in which are the equidistant holes for the circular group of parallel pipes.

In putting the parts together it is preferable to screw on the upper head G to the case B either before or after the thimble K has been screwed into such upper head,'and by providing a screw thimble O at the opening in the lower head, such lower head G can be screwed upon the case F with the lower thimble K projecting, after which the screw thimble 0 can be screwed up to place and also a lock nut O, and by providing a lock nut 0 adjacent to the upper head G the parts are rendered steam tight. 1

At P I have represented a train pipe for steam from the locomotive, from which a branch pipe R with a cock S leads the steam to the upper end of the steam heating device,

the tube passing from the cock S through the top head G and at the bottom head G atube T is connected for leading away the Water of condensation to a free outlet below the car, or to an air valve or trap operating automatically for the discharge of the water of condensation. By this construction I am enabled to obtain an extended area for the action of steam upon the circulating water, because the pipes H are comparatively small, but as a whole they present to the steam a large area for the heating action, and there is in this apparatus a very potent force to efiect the circulation rapidly of the water through the radiating coils within the car, and this improvement can be applied to almost any car heater of the type generally designated as the Baker car heater, and this steam attachment does not in any wise interfere with the efficiency of the ordinary heater under the action of fire,

I claim as my invention- 1. The combination in a heater of an external case, heads permanently connected to said c'ase, couplings within the case near the ends, each having a central opening at one end, a diverging body and plate at the other end with a circular range of holes, a group of parallel tubes secured in said holes and tubular connections passing through the ends of the case and into the couplings substantially as specified.

2. The combination in a car heating apparatus, with the pipes for the circulating wa ter, of a cluster of vertical pipes, end couplings connecting the cluster of pipes to the single pipes in the circulating system, thimbles at the couplings, upper and lower heads through which the thimbles pass, and a case screwed at its ends to the respective heads, a steam supply pipe and a pipe for the water of condensation, substantially as set forth.

3. The combination in a car heating apparatus, with the pipes for the circulating water, of a cluster of vertical pipes, end couplings connecting the cluster of pipes to the single pipes in the circulating system, thimbles at the couplings, upper and lower heads through which the thimbles pass, and a case screwed at its ends to the respective heads, a screw thimble surrounding the tubular thimble at one end and screwing into one of the heads, and a lock nut, a steam supply pipe and a pipe for the water of condensation, substantially as set forth.

Signed by me this 17th day of December, 1891.

WV. 0. BAKER.

Witnesses:

GEO. '1. PINCKNEY, WILLIAM G. MOTT. 

